巻号一覧
8 巻, 6 号
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片山 英太郎1958 年 8 巻 6 号 p. 3-4
発行日: 1958年
公開日: 2009/09/04
ジャーナル フリーPDF形式でダウンロード (389K) -
池野 尚志, 四津 新吉, 市井 収1958 年 8 巻 6 号 p. 5-10
発行日: 1958年
公開日: 2009/09/04
ジャーナル フリーThe effect of lubricants upon the comppressed deformation of aluminium Sheets was investigated by comparison with the already known coefficients of friction. It is found that MoS2 gives the superior workability to the deep drawing of aluminium sheets and has an excellent effect to preventthe rup ture, edge rumples, etc. during pressing.抄録全体を表示PDF形式でダウンロード (1503K) -
細井 吉一1958 年 8 巻 6 号 p. 11-23
発行日: 1958年
公開日: 2009/09/04
ジャーナル フリーW. A. Wood and his co-workers suggested that plastic deformation of aluminium at high temperature had three stage mechanism: namely, (i) the familiar process of slip, (ii) a process that supersedes the slip as the temperature of deformation is increased or the rate of strains decreased, or the cell mechanism, and (iii) a process of boundary micro-flow of grains or cells, and that one of three processes supersedes the other two according to the conditions of deformation.
Considering the deformation mechanisms mentioned above, be investigated the structure deformation due to extrusion by microscopic and X-ray examination of 99.80% aluminium forged billet, 99.995% high purity aluminium billet, 99.85% aluminium cast billet and Al-Cu (3%) alloy billet.
In this paper, microstructures of these billets are discussed showing their X-ray photographs抄録全体を表示PDF形式でダウンロード (3874K) -
細井 吉一1958 年 8 巻 6 号 p. 24-28
発行日: 1958年
公開日: 2009/09/04
ジャーナル フリーStructures and their changes by annealing of 99.995% aluminium extruded rods were investigated under microscope and X-ray technique.
The results obtained are as follows:
(1) The structures of rods extruded from cast billets are almost similar to that of rods extruded from forged ones, and these structures have something to do with the deformation structures of billets extrusion.
(2) The examination of structural changes by annealing of rods extruded at 550°C reveales that any generation and growth of nuclei do not occur even in softening which has so far been considered due to by recrystallization.
(3) But, the examination of the changes of rods extruded at 325°C, reveals that there are new structures which are thought as the result of generation and growth of nuclei by recrystallization.抄録全体を表示PDF形式でダウンロード (1537K) -
(第1報)顯微鏡組織について細井 吉一, 沢登 英一1958 年 8 巻 6 号 p. 29-32
発行日: 1958年
公開日: 2009/09/04
ジャーナル フリーMicrostructures of 99, 85% aluminium rods extruded from as cast billets by various extruding conditions were observed by microscope and discussed considering the deformation structures of their billets by extrusion. The results obtained are as follows:
(1) The grains of rods extruded by higher reduction are narrow and long in the extruding direction.
(2) Microstructures of rods extruded at 325°C are similar to that of cold worked ones.
(3) The sub-grains structures probably produced by dendrite structures of cast billet are found in the specina. ens extruded at 550°C
(4) Linear structures are discovered in the specimens with sub-grains structures described (3) above.抄録全体を表示PDF形式でダウンロード (1120K) -
(第2報)繊維組織について組井 吉一, 沢登 英一1958 年 8 巻 6 号 p. 33-36
発行日: 1958年
公開日: 2009/09/04
ジャーナル フリーThe fiber structures of 99.85% alumininm rods extruded from as cast billets were investigated by means of X-ray diffraction patterns. The results of tained are as follows:
(1) The rods which were extruded at lower temperature by higher reduction have higher degree of fiber structure, while those at higher temperature by lower reduction have lower degree of fiber structure.
(2) The remarkable change of fiber structure was not seen in the longitudinal direction of rods, but in the radial direction the fiber structure is higher in its degree near the centre than at the surface of the rods. It was observed that the [III] direction near the surface is inclined some degree to the extruding direction. These are more remarkable in the rods extruded at higher temperature by lower reduction.
(3) Split of arcs diffraction rings into tiny dots or breaking up of streak patterns is related to sub-grains or linear structures which are clearly observed in the specimens extruded at higher temperature by lower reduction.抄録全体を表示PDF形式でダウンロード (567K) -
(第3報)焼なましによる組織変化について細井 吉一1958 年 8 巻 6 号 p. 37-40
発行日: 1958年
公開日: 2009/09/04
ジャーナル フリーThe annealing curves of 99.85% aluminium rods extruded from as cast billet are almost similar to those of cold worked metals.
But, on examination of structural changes of the annealed specimens under microscope, it was found that any generation and growth of nuclei did not occur even in softening phenomenon which has so far been explained by recrystallization, and that linear structures were changed.
These softening phenomena were also investigated by X-ray.抄録全体を表示PDF形式でダウンロード (771K) -
振動電解研磨の基礎的研究(2)中山 孝廉1958 年 8 巻 6 号 p. 41-55,40
発行日: 1958年
公開日: 2009/09/04
ジャーナル フリーChapter 3 Effect of electrolytic conditions on polishing results (Continued).
3.6 Effect of surface area of anode;
It was confirmed that Dr. Miyoshi's formala concerming this problem could be applied to this study, as follows;
lnD=alnS+b
where, D: Current devity S: Surface area of anode and in this case.
a=0.24 b=3.27
3.11 Concepts for the above
Smoothly electropolished surface is obtained by arranging the velosity of revolution, from 120r. p. m. to 200r. p. m., (or relative flow of electrolyte to the anode surface 19.2 to 32.0 meter per minute in linear velosity) bath temperature 70°C, 20-40A/dm2 current density phosphoric acid, as electrolyte, 80%.
Chapter 4 Experiments on the anode potential and the cathod potential;
In the limit of the electropolishing range the anode potential is completely proportional to the bath voltage, reading more than 20 Volts, while the cathode potential keeps constantly about -0.8 Volt.抄録全体を表示PDF形式でダウンロード (2293K) -
アルミニウム合金(3S,52S,61S)のホウケイ酸系に対する下処理について山田 敏夫, 杉山 隆1958 年 8 巻 6 号 p. 56-60
発行日: 1958年
公開日: 2009/09/04
ジャーナル フリーChemical and anodic methods as the pretreatment of aluminium alloys were tried to find out the best method of pretreatment for Borosilicate frit.
As a result of the present examination it has been discoverd that in the anodic oxidation treatment with metasodium sllicate, sodium perborate, lithum borate and kalium borate, which were effective for aluminium plate as previously reported, were also most effective in pretreatment of aluminium alloys, in view of the result of bending and thermal shock tests.
In the chemical treatment it was noticeable that the Alrok method showed good results in the bending and the thermal shock test.抄録全体を表示PDF形式でダウンロード (631K) -
森永 卓一, 細井 吉一, 沢登 英一1958 年 8 巻 6 号 p. 61-64
発行日: 1958年
公開日: 2009/09/04
ジャーナル フリーEffect of beryllium on burning of magnesium in Al-10%Mg alloys is studied by thermobalance technique. The results are as follows:
(1) Beryllium is useful element to prevent oxidation of magnesium in Al-10%Mg allols. Even a very small amount of beryllium, e. g. 0.001%, plays a good role, if the molten alloy is held for a short time.
(2) Burning of magnesium proceeds by making lots of pits in molten alloy and when the “pit-burning” starts, beryllium element is no longer effective.
(3) Beryllium inhibits the burning of magnesium also in the solid state alloy, hence the formation of feathered semitransparent films during solidification of the alloy would be prevented by adding beryllium.抄録全体を表示PDF形式でダウンロード (490K) -
麻田 宏, 小森 進一, 青木 顕一郎, 青山 耕三1958 年 8 巻 6 号 p. 65-73
発行日: 1958年
公開日: 2009/09/04
ジャーナル フリーThe manufacturing of the high purity magnesium and especially of the Iron Free Magnesium (I. F. M.) were studied and the semiindustrial manufacturing of the I. F. M. was succeeded.
The corrosion resistance of the I. F. M. for 3% NaCl solution is exellently good. Using the I. F. M., the effects of Fe, Mn, Na, Al, and Zn on the corrosion resistance and other properties of magnesium were studied and the results were as follows:
When iron is less than 0.0014%, the corrosion resistance of magnesium is excellently good, but over this percentage of iron, the corrosion resistance of magnesium becomes destructively bad.
Manganese has no effect on the corrosion resistance of the I. F. M., while the corrosion limit of iron contents ascends from 0.0014% to 0.0027%, when manganese is 0.2%.
Aluminium and zink also has no effect, unless its content is less than 4% respectively.
Natrium content does not deteriorate the property.
Variation of recrystallization temperature of high purity magnesium depends on the iron content, namely that of Fe 0.001% is 100-125°C, of Fe 0.0014-0.0054% is 125-150°C and of Fe 0.0085% is 150-175°C.抄録全体を表示PDF形式でダウンロード (1131K) -
1958 年 8 巻 6 号 p. 73
発行日: 1958年
公開日: 2009/09/04
ジャーナル フリーPDF形式でダウンロード (87K) -
草道 英武, 湯河 透, 宮本 一雄, 寺垣 正明, 蔵本 良助1958 年 8 巻 6 号 p. 74-81
発行日: 1958年
公開日: 2009/09/04
ジャーナル フリーTitanium tubing has increased its importance in chemical industries because of its excellent corrosion resistance.
At the present time, titanium tubes are manufactured primarily by the following two processes in the authors' company.
1 Hot extruding, which is usually followed by cold drawing.
2 Rolling sheet strip into tube form, and shielded are welding with or without suhsequent cold drawing.
The titanium tube manufactured by means of welding and cold drawing, is called “weldrawn tube” representing high quality.
The authors prepared the KS-50 titanium (Commercially high purity grade) weldrawn tubes, for the welding of which an inert gas chamber welding apparatus wat used.
This report involves the investigations of these weldrawn tube on their mechanical properties and microstructure of cross section.
The results are summarized as follows:
1 Dimensional test of titanium weldrawn tube indicated that wall-thickness and concentricity could be maintained within very narrow limits. Surface appearance was also excellent.
Microstructure as well as hardness of the tube cross section became uniform in welded and unwelded zones by cold drawing and annealing.
2 In practical tests, titanium weldrawn tube showed that its values exceeded those of JIS specification on seamless and electric welded steel pipes.
3 The weldrawn tube of 23OD×1.65t withstood hydraulic pressure of 600kg/cm2 G and the permanent strain of the tube at the test was 5×10-3 in circumference.
4 Titanium clad steel pipe was manufactured by the authors as one of applications of titanium weldrawn tube.抄録全体を表示PDF形式でダウンロード (2082K)
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